;;; company-dabbrev-code.el --- dabbrev-like company-mode backend for code -*- lexical-binding: t -*-
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;; Copyright (C) 2009, 2011, 2014 Free Software Foundation, Inc.
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;; Author: Nikolaj Schumacher
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;
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;;; Code:
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(require 'company)
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(require 'company-dabbrev)
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(require 'cl-lib)
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(defgroup company-dabbrev-code nil
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"dabbrev-like completion backend for code."
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:group 'company)
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(defcustom company-dabbrev-code-modes
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'(prog-mode
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batch-file-mode csharp-mode css-mode erlang-mode haskell-mode jde-mode
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lua-mode python-mode)
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"Modes that use `company-dabbrev-code'.
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In all these modes (and their derivatives) `company-dabbrev-code' will
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complete only symbols, not text in comments or strings. In other modes
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`company-dabbrev-code' will pass control to other backends
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\(e.g. `company-dabbrev'\). Value t means complete in all modes."
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:type '(choice (repeat :tag "Some modes" (symbol :tag "Major mode"))
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(const :tag "All modes" t)))
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(defcustom company-dabbrev-code-other-buffers t
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"Determines whether `company-dabbrev-code' should search other buffers.
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If `all', search all other buffers, except the ignored ones. If t, search
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buffers with the same major mode. If `code', search all buffers with major
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modes in `company-dabbrev-code-modes', or derived from one of them. See
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also `company-dabbrev-code-time-limit'."
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:type '(choice (const :tag "Off" nil)
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(const :tag "Same major mode" t)
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(const :tag "Code major modes" code)
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(const :tag "All" all)))
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(defcustom company-dabbrev-code-time-limit .1
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"Determines how long `company-dabbrev-code' should look for matches."
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:type '(choice (const :tag "Off" nil)
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(number :tag "Seconds")))
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(defcustom company-dabbrev-code-everywhere nil
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"Non-nil to offer completions in comments and strings."
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:type 'boolean)
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(defcustom company-dabbrev-code-ignore-case nil
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"Non-nil to ignore case when collecting completion candidates."
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:type 'boolean)
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(defun company-dabbrev-code--make-regexp (prefix)
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(concat "\\_<" (if (equal prefix "")
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"\\([a-zA-Z]\\|\\s_\\)"
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(regexp-quote prefix))
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"\\(\\sw\\|\\s_\\)*\\_>"))
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;;;###autoload
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(defun company-dabbrev-code (command &optional arg &rest ignored)
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"dabbrev-like `company-mode' backend for code.
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The backend looks for all symbols in the current buffer that aren't in
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comments or strings."
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(interactive (list 'interactive))
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(cl-case command
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(interactive (company-begin-backend 'company-dabbrev-code))
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(prefix (and (or (eq t company-dabbrev-code-modes)
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(apply #'derived-mode-p company-dabbrev-code-modes))
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(or company-dabbrev-code-everywhere
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(not (company-in-string-or-comment)))
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(or (company-grab-symbol) 'stop)))
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(candidates (let ((case-fold-search company-dabbrev-code-ignore-case))
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(company-dabbrev--search
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(company-dabbrev-code--make-regexp arg)
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company-dabbrev-code-time-limit
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(pcase company-dabbrev-code-other-buffers
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(`t (list major-mode))
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(`code company-dabbrev-code-modes)
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(`all `all))
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(not company-dabbrev-code-everywhere))))
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(ignore-case company-dabbrev-code-ignore-case)
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(duplicates t)))
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(provide 'company-dabbrev-code)
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;;; company-dabbrev-code.el ends here
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